Internal-combustion engine



Nov. 16 1926.

A. H. LEIPERT INTERNAL COMBUSTION ENGINE Filed April 25, 1924 INVENTOR M nrro N575 Patented Nov. 16, 1926.

I UNITED STATES 1,607,265 PATENT OFFICE.

AUGUST H. LEIPERT, OF COLLEGE POINT, NEW YORK, ASSIGNOR TO INTERNATIONAL MOTOR COMPANY, OF NEW YORK, N.

Y., A CORPORATION OF DELAWARE.

INTERNAL-COMBUSTION ENGINE.

Application filed April 2'5,

The use of aluminum in engine construction is rapidly increasing. Certain disadvantages attach to its use for certain purposes particularly at points where mechan1-- cal wear is involved and where a diificult casting must be made. It has been proposed heretofore to providein an aluminum motor 'cast iron valve seats but such provision has been more in the nature of an expedient and has not conformed to the fullest requirements in manufacture and use. The principal object of the present invention isto provide in a motor of aluminum or other such metal a section of metal having such properties as best facilitate the. casting of necessary parts therein and the resistance of mechanical wear. For the purposes of this application a section of cast iron will be described as incorporated bodily within an aluminum motor at such a point as to provide several of the needed parts, such as valve seats, water jacket,inlet and exhaust ports, and cylinder sleeve support. The construction is simple and rugged and permits most effective cooling of the parts named and provides at once for the incorporation of all of these parts working in a single section which may be removed from the block as a unit. w

The details of construction and advantages of the improved engine will appear at greater length in connection with the description of the embodiment shown in.the accompanying drawings, wherein:

Figure 1 is a view in vertical section of an aluminum motor having a cast irop sec-- -tion incorporated directly therein.

Figure 2 is a view-in side elevation of a fragment of an engine block constructed in accordance with the invention.

While the invention is not to be limited to aluminum as the rincipal metal nor to cast iron as the meta? for the separate unitary section, since the development of the art may displace either one of these metals for particular uses, they will be referred to herein for convenience. Further, it will be evident as the description proceeds that one or more of the working parts which are to be described as incorporated in the selfcontained unitary cast iron section may be omitted therefrom without losing the advantages with respect to the remaining parts.

1924. Serial No. 708,853.

In the drawings there is shown a conventional type of motor having a base section a of aluminum to which may be secured the detachable crank case b, and at the top of the motor is a removable engine-head c. Valves d are shown as being of any suitable form operated through a cam shaft d which may be driven from the crank shaft 6. Since it has been found that valve seats cast in aluminum are not satisfactory provision has been made for introducing cast iron seats in the aluminum body either by means of a separate plate or by separate liners for. the seats. However, these expedients are not entirely practical from the standpoint of the manufacturer nor are they efiective in use. By the present invention it is proposed to incorporate in the engine casting a section of suitable metal such as cast iron in which the valve seats and other working parts may be conveniently incorporated to the end that such a self-contained section with the principal working parts may be cast and assembled withutmost facility. Such a section is indicated at f. It has formed thereon both the inlet and exhaust ports of which an inlet port 0 is illustrated; An exhaust port, which is not shown, is also cast in the section f. Since the seat f for the valve d is formed in the cast iron section it is durable and satisfactory. The section f, which may be of at least sufficient depth to accommodate the inlet and exhaust ports as described, has formed in its walls a water jacket f which may communicate in the usual manner with the jacket section 0 of the head. In the type of motor, in which a removable cylinder sleeve 9 is employed a shouldered recess f is cast in the section f to support it by engagement therewith of a circular flange g at the upper end of the sleeve. Through bolts "k may pass from the lower section a through the cylinder head 0 for geneous throughout so that there are no varying rates of expansion and contraction found between engaging parts. All of the essential elements of the motor having to do with its operation may be said to be cast iron within the other section f such as the inlet and exhaust orts, the water jacket, valve seats and cylmder sleeve suport. In addition, the water inlet (not '11- ustrated) may be carried with the cast iron section 7. One of the advantages of having this arrangement is that an easy casting in iron is afiorded, ruggedness is obtained where required and all of the elements are self-contalned in a unit which may be easily assembled or scraped as required.

As indicated, one or more of the elements may be omitted without destroying the advantages pertaining to the inclusion of the rest and a metal of any desired properties may be employed.

combination with a base and head of aluminum, an intermediate cast iron section having formed therein inlet and exhaust ports and valve seats, through bolts extending through the head and intermediate section into the base section to secure the intermediate section in place.

2. In an internal combustion engine, in combination with a removable cylinder sleeve, a' base section and head of aluminum, an intermediate cast iron section disposed between the base section and head and having a shouldered recess within which the cylinder sleeve is supported.

This specification sighed this 23 day of April A. D. 1924.

' AUGUST I-L LEIPERT. 

